Retort-door attachment



P. F. DUNDON.

RETORT DOOR ATTACHMENT.

APPLICATION FILED APR. 11. ms.

Patented Sept. 23, 1919.

A TTOR NE Y5 rm: coLuMulA PLANOIJKIAMI cm, WASHINGTON. n. c.

- the City ATEN'I on'nron.

PATRICK FRANCIS DUNDON, OF SAN FRANCISCO, CALIFORNIA.

nnronr-noon ATTACHMENT.-

Specification of Letters Patent.

Patented Sept. 23, 1919.

Application filed April 17, 1918. Serial No. 229,214.

To all whom it may concern:

Be it known that I, PATRICK F. DUNDON, a citizen of the United States, residing at and county of San Francisco and State of California, have invented new and useful Improvements in Retort-Door Attachments, of which the following is a specification.

This invention relates to closing and securing means for digester, retort, and like doors, having an internal pressure when closed, which pressure must be relieved before the door is fully opened.

The invention is an improvement upon my Patent No. 653,503, issued July 10th, 1900, and provides for an adjustment and a support for the heavy swinging door, when released from the normal closing devices, and while they may be partially released to allow the internal pressure to es cape before the door is fully opened.

Referring to the accompanying drawing:

The figure is a perspective view'of the retort door. 7

A represents the retort or other chamber to be employed, 2 is a door frame her1net1 cally secured about the retort opening, and 3 is the door.

Doors for retorts and like chambers which are subjected to internal pressure of steam, gas, or other pressure, must be so disposed that they may be firmly and hermetically closed, when under pressure, and must be first partially released to allow the internal pressure to gradually escape, and finally fully released to entirely disclose the interior of the chamber and allow its contents to be removed.

I have found that these operations may be most quickly and accurately effected by supporting the door from one side of the door frame 2 by means of bars 4 which pass loosely through housings 5. The housings are fixed to the door and the bars are hinged to the door frame, and at the ends opposite the hinges are devices to draw the door firmly into closed position.

The door 3 has a tight fitting periphery to form a joint with the door frame, and the slotted housings 5 are secured upon the exterior of the door. Through these housings the bars 4 pass and are hinged at one end to the door frame, as shown at 6. The bars may be swung about the hinges, carrying with them the door from an open to a closed position, and when closed they are drawn tight by eccentrics 7 and actuating levers 8 which act to press the edges of the door against the door frame. Hook-shaped latches 9 are hinged at opposite sides of the door frame and these latches engage coacting latches on the door. When the locking means are disengaged the door hangs loosely within the housings and may be forced open by the internal pressure until checked by the latches 9, and this allows the interior pressure medium to escape previous to a full opening of the door. When the door is thus released, its weight tends to cause it to sag, and this is resisted by means of a bar 10 which is hinged parallel with the bars 4 and with its pintle in line with those of the bars.

. The outer end of the bar 10 passes through :1 lug 11, fixed to'the face of the door, and the end of the bar is screw-threaded to receive a nut 12 which may be turned so that this bar will prevent the door from sagging during its operation. In order to insure the door remaining in its proper position, if released from its hinged supports or by sagging, I have shown two fixed bracket lugs 13 projecting from the door frame just below the bottom of the door, which may thus rest upon and be supported by these brackets.

By this construction the door is free to move within certain limits in any direction, so that at the instant of closing it will be forced into accurate bearing against all portions of its seat, and, when released, will turnable, a supplemental bar having one end. In testimony whereof I have hereunto set hinged in line above the main hinges, a 'my hand in the presence of two subscribing lug upon the upper part of the door With a Witnesses.

hole throu%h Which said bar is shdable, a PATRICK FRANCIS DUNDON. 5 nut movab e upenthe threaded. end of the Witnesses:

bar, and a bracket proj eating from the front C. SEXTON,

' below the doqr.- ARTHUR PLAN I Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

. r Washington, D. 0. 

